Q. Arrange these sentence in correct order: 
1. Fires in the Steppes or bushes scared humans earlier.
P. Gradually, they learnt to appreciate the power of fire.
Q. It gave them light and warmth and kept away wild animals.
R. About 700,000 years ago, humans started fire accidentally by lightning.
S. They could harden the tips of wooden spears and cook meat in it.
6. Soon they learnt to produce fire by striking flintstone and pyrite with each other or by rubbing lumbers.